A legionary wearing the famous banded armour, the lorica segmentata, and the typical imperial 'Gallic' helmet. Also he has with him the famous curved, square shield, the gladius (sword) and a throwing spear (pilum).

Notice that by this time the helmet was a sophisticated device, featuring deflection areas and rims designed to crimple on impact and so absorb blows.
The rear neckguard is clearly visible, protecting from blows from behind. The cheek guards feature deflection panels to direct blows away from the neck.
The rim on the forehead would not merely prevent rainwater from running into the soldier’s face, but would also absorb a downward slash of a sword. Even the ear openings are furnished with such rims.